Finding the Third Proportional to 104,380 and 139,828

Step by Step Solution

1. Step 1: Write the proportion equation
   104,380 : 139,828 = 139,828 : x
2. Step 2: Convert to fraction form
   104,380/139,828 = 139,828/x
3. Step 3: Cross multiply
   104,380x = 139,828 × 139,828
4. Step 4: Simplify right side
   104,380x = 19,551,869,584
5. Step 5: Solve for x
   x = 19,551,869,584/104,380
6. Step 6: Final answer
   x = 187,314.33